package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.databind.ser.Serializers;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService
{
    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    private Orders orders;

    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 提交订单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    //在serviceImpl上加了@Transactional注解，所以Insert方法执行完后数据库还不会有数据，只有等方法执行完数据库才有数据。
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO)
    {
        //1.处理各种业务异常（地址栏或购物车为空）
            AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
            //设置订单的用户id
            BaseContext.setCurrentId(5L);
            Long userId = BaseContext.getCurrentId();
            ShoppingCart shoppingCart = new ShoppingCart();
            shoppingCart.setUserId(userId);
            List<ShoppingCart> cart = shoppingCartMapper.list(shoppingCart);
            if(addressBook == null)
            {
                throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
            }
            else if (cart == null || cart.size() == 0)
            {
                throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
            }
       //2.像订单表插入1条数据
            Orders orders= new Orders();
            BeanUtils.copyProperties(ordersSubmitDTO,orders);
            //设置订单的支付状态为：待支付(1)
            orders.setPayStatus(Orders.UN_PAID);
            //设置订单的订单状态
            orders.setStatus(Orders.PENDING_PAYMENT);
            //设置订单的下单时间
            orders.setOrderTime(LocalDateTime.now());
            //设置订单的地址(通过查表)
            orders.setAddress(addressBook.getDetail());
            //设置订单的手机号（在地址簿中）
            orders.setPhone(addressBook.getPhone());
            //设置收货人（在地址簿中）
            orders.setConsignee(addressBook.getConsignee());
            //设置用户id
            orders.setUserId(userId);
            //设置订单的订单号（用时间戳）
            orders.setNumber(String.valueOf(System.currentTimeMillis()));
            this.orders=orders;
            //向表中插入数据
            orderMapper.submit(orders);
        //3.像订单明细表插入n条数据
            List<OrderDetail> lists=new ArrayList<>();
            for (ShoppingCart sc:cart)
            {
                OrderDetail orderDetail = new OrderDetail();
                BeanUtils.copyProperties(sc,orderDetail);//订单明细
                orderDetail.setOrderId(orders.getId());//设置当前订单明细关联的订单
                lists.add(orderDetail);
            }
            orderDetailMapper.insertBatch(lists);
        //4.清空当前购物车
            shoppingCartMapper.clean(userId);
        //5.返回VO对象
            OrderSubmitVO orderSubmitVO=OrderSubmitVO.builder()
                    .id(orders.getId())
                    .orderTime(orders.getOrderTime())
                    .orderAmount(orders.getAmount())
                    .build();
            return orderSubmitVO;
    }

    /**
     * 订单支付
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception
    {
        // 当前登录用户id
        BaseContext.setCurrentId(5L);
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
        JSONObject jsonObject=new JSONObject();
        jsonObject.put("code","OrderPaid");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;//设置为待接单
        Integer OrderPaidStatus = Orders.PAID;//设置为已支付
        LocalDateTime check_out_time = LocalDateTime.now();//更新支付时间
        orderMapper.updateStatus(OrderStatus,OrderPaidStatus,check_out_time,this.orders.getId());

        //通过websocket向客户端浏览器推送数据type orderId content
        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",this.orders.getId());
        map.put("content","订单号："+this.orders.getNumber());
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo)
    {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    @Override
    public PageResult pageQuery(int pageNum, int pageSize, Integer status)
    {
        //1.设置分页
            PageHelper.startPage(pageNum,pageSize);

            OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
            ordersPageQueryDTO.setUserId(5L);
            ordersPageQueryDTO.setStatus(status);
        //2.分页条件查询
            Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);
            List<OrderVO> list = new ArrayList();
        //3.查询出订单明细，并封装入OrderVO进行响应
        /**
         * TODO 这里好难理解
         */
        if (page != null && page.getTotal() > 0)
        {
            for (Orders orders : page)
            {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 根据id查询订单详情
     * @param orderId
     * @return
     */
    @Override
    public OrderVO getOrderDetailById(long orderId)
    {
        //先根据订单id找到订单信息
        Orders orders = orderMapper.getById(orderId);
        // 再根据订单id查询该订单对应的菜品/套餐明细
        List<OrderDetail> list = orderDetailMapper.getByOrderId(orders.getId());

        // 将该订单信息及其详情信息 封装 到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(list);
        return orderVO;
    }

    /**
     * 客户端取消订单
     * @param orderId
     */
    @Override
    public void userCancelOrder(Long orderId) throws Exception //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
    {
        //- 待支付和待接单状态下，用户可直接取消订单
        Orders orderDB = orderMapper.getById(orderId);
        //先判断订单是否存在
        if(orderDB == null)
        {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //- 商家已接单或派送中状态下，用户取消订单需电话沟通商家
        else if(orderDB.getStatus() > 2 )
        {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(orderDB.getId());
        //处于待接单2时需要给用户退款
        if(orderDB.getStatus() == Orders.TO_BE_CONFIRMED)
        {
                //调用微信支付退款接口
//                weChatPayUtil.refund(
//                        order.getNumber(), //商户订单号
//                        order.getNumber(), //商户退款单号
//                        new BigDecimal(0.01),//退款金额，单位 元
//                        new BigDecimal(0.01));//原订单金额

                //支付状态修改为 退款
                orders.setPayStatus(Orders.REFUND);
        }
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户手动取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param orderId
     */
    @Override
    public void repetition(Long orderId)
    {
        //业务规则：再来一单就是将原订单中的商品重新加入到购物车中
        // 查询当前用户id
        BaseContext.setCurrentId(5L);
        //先拿到订单
        Orders orders = orderMapper.getById(orderId);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        //把东西批量加入到购物车
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 催单
     * @param orderId
     */
    @Override
    public void reminder(Long orderId)throws Exception
    {
        Orders ordersDB = orderMapper.getById(orderId);
        if(ordersDB == null)
        {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap<>();
        map.put("type",2);
        map.put("orderId",orderId);
        map.put("content","订单号："+ordersDB.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

//----------------------------------------上面是客户端，下面是管理端------------------------------------------------------

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO)
    {
        //开始分页查询（页码，每页条数）
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        //用Page对象接受
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        long total = page.getTotal();
        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics()
    {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 根据订单id获取订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id)
    {
        Orders order = orderMapper.getById(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(order,orderVO);
        List<OrderDetail> list = orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(list);
        return orderVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO)
    {
        Orders order = new Orders();
        order.setId(ordersConfirmDTO.getId());
        order.setStatus(Orders.CONFIRMED);
        orderMapper.update(order);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception
    {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED))
        {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == Orders.PAID) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id)
    {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 订单只有存在且状态为3（接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED))
        {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 派送中需要根据订单id更新订单状态
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id)
    {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 订单只有存在且状态为4（派送中）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS))
        {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 派送中需要根据订单id更新订单状态
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 商家取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void AdminCancelOrder(OrdersCancelDTO ordersCancelDTO)
    {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == 1) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }
        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orderMapper.update(orders);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page)
    {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }
    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders)
    {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }



}
